Number of threads per site in global queue

There is a button in global queue for the number of threads, could you include one for the number of threads per site too?
it will be very useful.

Thanks
PookY

You can change this setting in the preferences (0 is default, unlimited)

Yes, and you can change the number of threaths there too. but i say that it would be useful to be placed it too with the "number of threads" in the global queue tab.